Apart from egregious assholes and dysfunctional relationships (like the mentioned husband and wife teams), there are milder and more "diffuse" kinds of toxic en

Apart from egregious assholes and dysfunctional relationships (like the mentioned husband and wife teams), there are milder and more "diffuse" kinds of toxic environment. For example: within the company, IT is a second class citizen compared to production, so as a new developer you would start at the bottom of the bottom with no valid career perspectives. Low budget, bad offices, low pay, appearance of overwork are clear signs. For example: aberrant company culture. Excessive secrecy and/or security measures (who do they think they are?), extravagant recreational resources (are they actually working?), excessive luxury (not bad by itself, but you want them to spend that money on your salary), excessive conviviality, etc. There is a meta-warning sign about company culture: refusal to show working conditions and procedures to you because of conscious "discretion" and subconscious shame. Also, you could like, accept as normal, or justify because they make sense in context some of the bad attitudes you are aware of, failing to see they are a problem.